*{
    margin: 0;
    padding: 0;
}
h1,h2,h3,h4,h5,h6{
    font-weight:normal;
}
ul,li{
    list-style-type: none;
}
a{
    text-decoration: none;
    color: #0c0c0c;
}
a:hover{
    color: #ee1717;
}
body{
    position:relative;
    background-color: #f5f5f5;
}
nav{
    height: 50px;
    background-color: #39bebe;
}
nav .a1{
    color: #ffffff;
    display: block;
    height: 50px;
    position: absolute;
    left:20px;
    line-height: 50px;
}
nav .a2{
    color: #ffffff;
    display: block;
    height: 50px;
    position: absolute;
    left:90px;
    line-height: 50px;
}
nav .a3{
    color: #ffffff;
    display: block;
    height: 50px;
    position: absolute;
    left:160px;
    line-height: 50px;
}
.person_message{
    position: absolute;
    top:60px;
    left: 10px;
    background-color: #ffffff;
    border: 1px solid gainsboro;
    box-shadow: #9c9c9c 0px 0px 10px;
}
.message1{
    width:300px;
    height: 510px;
}
.message11{
    display: block;
    height: 50px;
    line-height: 50px;
    border-bottom:1px solid gainsboro;
}
.photo{
    display: block;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin-bottom: 10px;
    margin-left: 85px;
    margin-top: 5px;
}
.nav_right{
    position: absolute;
    right: 50px;
    top:5px;
}
.nav_photo{
    border-radius: 50%;
    height: 40px;
    width: 40px;
}
#p_id{
    position: relative;
    top:-15px;
}
.list li{
    width:300px;
    height: 65px;
    margin-bottom: 5px;
}
.btn1{
    float: left;
    border: 0 none;
    background-color: #ffffff;
    display: block;
    width: 100px;
    height: 50px;
    font-size: 16px;
    text-align: left;
}
.list li:hover{
    box-shadow: 0px 0px 10px #9c9c9c;
}
.div1,.div2,.div4{
    float: right;
    height: 50px;
    line-height: 50px;
    margin-right: 5px;
}
.right_message{
    position: absolute;
    top:65px;
    left: 400px;
    width: 900px;
    background-color: #ffffff;
    border: 1px solid gainsboro;
    box-shadow: #9c9c9c 0px 0px 10px;
}
.message_detail li,.change_password1 li{
    width: 900px;
    height: 50px;
}
label.red_star:before {
    content: '* ';    /*在label元素前加上红色的 * */
    color: red;
}

.message12 button{
    height: 50px;
    line-height: 50px;
    border-bottom:1px solid gainsboro;
    margin-bottom: 10px;
}
.message12 button:hover{
    box-shadow: 0px 10px 20px 0px rgba(56, 243, 170, 0.5);
}
.message_detail li .m1,.change_password li .m1{
    width: 700px;
    height: 30px;
    border: 1px solid gainsboro;
}
input[type="submit"]{
    display: block;
    width: 60px;
    height: 40px;
    border: none;
    background-color:#39bebe;
    border-radius: 10px;
    margin: auto;
}
.change_password{
    display: none;
    background-color: #ffffff;
    position: absolute;
    left: 400px;
    top:65px;
    height: 359px;
    width: 900px;
    border: 1px solid gainsboro;
    box-shadow: #9c9c9c 0px 0px 10px;
}
.btn2{
    border: 0 none;
    background-color: #ffffff;
    width: 100px;
    height: 50px;
    font-size: 16px;
}